215140350 has 48 divisors (see below), whose sum is σ = 541536768. Its totient is φ = 56511840.

The previous prime is 215140333. The next prime is 215140379. The reversal of 215140350 is 53041512.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 654 + ... + 20753.

It is an arithmetic number, because the mean of its divisors is an integer number (11282016).

Almost surely, 2^215140350 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215140350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270768384).

215140350 is an abundant number, since it is smaller than the sum of its proper divisors (326396418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215140350 is a wasteful number, since it uses less digits than its factorization.

215140350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21489 (or 21484 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 215140350 is about 14667.6634131003. The cubic root of 215140350 is about 599.2029694839.

Adding to 215140350 its reverse (53041512), we get a palindrome (268181862).

The spelling of 215140350 in words is "two hundred fifteen million, one hundred forty thousand, three hundred fifty".